/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package edu.tjut.cs.domain;

import java.math.BigDecimal;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;

@Entity
public class OrderLine {
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@ManyToOne
	private Product product;

	@ManyToOne
	private Order order;
	
	@Column(nullable = false)
	private BigDecimal price;  // 商品单价

	private int amount;  // 购买数量

	public OrderLine(Product product) {
		this(product, 1);
	}

	public OrderLine(Product product, int amount) {
		this.product = product;
		this.amount = amount;
		this.price = product.getPrice();
	}

	public OrderLine() {
	}

	public Product getProduct() {
		return product;
	}

	public int getAmount() {
		return amount;
	}

	public BigDecimal getUnitPrice() {
		return price;
	}

	public BigDecimal getTotal() {
		return price.multiply(BigDecimal.valueOf(amount));
	}
}
